2/3 cup sugar
1/2 cup reduced-fat sour cream
2 TBSP. butter, softened
2 egg whites
3/4 cup mashed very ripe bananas (2 medium)
1 tsp. vanilla
1 cup all-purpose flour
1/2 tsp. baking soda
1/4 tsp. salt
2 TBSP. finely chopped walnuts
White Frosting, (recipe follows)
Ground nutmeg, if desired

1 1/4 cups powdered sugar
1 TBSP. butter, softened
1/2 tsp. vanilla
1 TBSP. skim milk (1 to 2 TBSP.)

Heat oven to 375 degrees. Spray square pan, 9 x 9 x 2 inches, with cooking spray. Beat sugar, sour cream, butter and egg whites in large bowl with electric mixer on low speed 1 minute, scraping bowl occasionally. Beat in bananas and vanilla on low speed 30 seconds. Beat in flour, baking soda and salt on medium speed 1 minute, scraping bowl occasionally. Stir in walnuts. Spread in pan. Bake 20 to 25 minutes or until light brown; cool. Frost with Frosting. Sprinkle with nutmeg. Cut into 6 rows by 4 rows.

Mix all ingredients until smooth and spreadable.